FR3044972A1 - LIGHT WINDSHIELD OF VEHICLE WITH INTERNAL LIGHT SIGNALING. - Google Patents

Abstract

The invention relates to a laminated vehicle windshield, with internal light information (100 to 700), comprising a first glazing unit (1), a lamination interlayer, a second glazing unit (1 '), peripheral inner masking layers. and outside. A first organic light-emitting diode device called OLED (2) curved, is between the faces F2 and F3, the first OLED device forming a first signage

Description

The invention relates to the field of vehicle-type windshields incorporating luminous signage, in particular light pictograms. BACKGROUND OF THE INVENTION

Windshields are now equipped with a visual information display system for driving assistance.

The application WO2013 / 093351 thus proposes a laminated windshield with light information comprising: a first outer masking peripheral layer, opaque, in black enamel, in contact with the inner face of the first outermost glazing, a second opaque masking peripheral layer for the interior, in black enamel, in contact with the inner face of the second innermost glazing, this masking layer comprising openings forming pictograms, - a uniform layer of a doped material in luminescent species selected for absorbing light radiation produced by a UV radiation generating source, such as a light emitting diode array and for retransmitting light radiation in the visible range, said uniform light emitting layer being arranged in the glazing between the inner and outer masking layers.

Admittedly, this proposed solution allows to deport the information in an edge zone of the windshield, where the contrast remains sufficient so that the information is visible only from the inside without requiring the use of coherent light excitation sources, high power, or complex because equipped with directional control systems beam.

However, the use of a UV source presents a risk from an eye safety point of view and makes the device complicated. Finally, the luminescent particles remain sensitive to heat and whitening. Thus, the maturity of this technology is not yet acquired.

The present invention proposes to provide a laminated windshield of vehicle with internal light information to address all of the problems mentioned above, while being controlling its cost.

More specifically, the present invention relates to a laminated windshield vehicle with internal luminous signage, comprising: - a first glazing, curved, preferably mineral glass, optionally tinted, including gray or green, with a first main face said F1 intended to be external side of the vehicle and a second opposite main face so-called F2, glazing E1 thickness preferably at most 2.5mm, even at most 2mm - in particular 1.9mm, 1.8mm, 1, 6mm and 1,4mm- or even at most 1, 3mm or at most 1 mm, - a second glazing, curved (like the first glazing), preferably in mineral glass, with a third main face called F3 and a fourth opposite main face so-called F4 in particular intended to be inside the vehicle, of thickness ΕΊ preferably smaller than E1, even of at most 2.2mm, even at most 2mm -in particular 1.9mm, 1.8mm, 1.6mm and 1.4mm or even at most, 3mm or plus 1mm, the total thickness of the glazings Ε1 + ΕΊ being preferably strictly less than 4mm, even at 3.7mm, at least one - and better still both - of the first and second glazings being made of mineral glass, the other optionally in organic glass such as a polycarbonate, said first and second glazings being interconnected via the faces F2 and F3 by a lamination interlayer of thermoformable polymeric material (clear, extraclear), preferably thermoplastic, face side F2, of thickness (total ) E3 of not more than 2.2mm better than 2mm, not more than 1.5mm or not more than 1mm, for example from 1, 2 or 3 sheets, in particular indented from the edge of the second glazing (not more than 5mm or not more than 2mm or not more than 1mm) and even recessed from the edge of the first glazing- (not more than 5mm or not more than 2mm or not more than 1mm ), interlayer comprising a first main face bonding side F2 and a second main face-side bonding adhesive F3, - a first inner-masking peripheral layer made of an opaque material, which is between the second bonding face and the face F3, in particular along a border of the face F3, in particular ( directly) on the face F3 or (directly) on the second bonding face- or which is on the face F4, in particular along a border of the face F4, -notamment (directly) on the face F4 or (directly) on the second bonding face, - a second peripheral layer called external masking layer of opaque material, between the first bonding face and the face F2, opposite the inner masking layer and the possible passage opening, -so along a border of the face F2-, a first light source capable of emitting a first radiation for a first signage

In addition, the first light source is a first OLED organic light-emitting diode device, bent (flexible, flexible bus) of thickness E2 less than E3 and preferably subcentimetric and even at most 0.5 mm and better at most 0.35 mm in particular substantially equal thickness to a thermoplastic sheet so 0.76 mm, 0.38 mm or 0.17 mm which can be drilled to accommodate the OLED device on a possible support.

The first OLED device is able to emit a first radiation (monochromatic or polychromatic) in the visible spectrum illuminating (directly) the first signaling (and even able to emit a second distinct radiation by a control).

The first OLED device forms a first luminous sign, in sign (s) and / or letter (s),

When the first OLED device is in the zone of the inner masking layer, and better between the inner and outer masking layers, the inner masking layer comprises a first opening called passage including geometric contour, to leave the first luminous signage related.

The first OLED device preferably comprises a first curved substrate carrying a lower electrode (the closest to the substrate), a first organic electroluminescent system, and a so-called upper electrode (the farthest from the substrate).

Using an OLED device rather than a UV source is safer. In addition, its presence between the windows rather than externally and spaced from the windshield ensures better integration and easier installation. OLED technology, reliable, allows good backlighting performance (intensity, color rendering, stability) without glare and is thin making possible the lamination.

The flexibility of the flexible OLED allows to marry the bending of glazing.

In the present application, the descriptive designation is based on iconic and / or linguistic semantics, that is to say using signs (numbers, pictograms, logos, symbolic colors, etc.) and / or a letter or words. . The invention is particularly suitable for a windshield of rectangular shape defined by its lateral and longitudinal edges and with an opaque peripheral frame, such as enamel, face F2 and face F3 or F2 and F4.

The first signage and even a second sign or a plurality of signs each formed by a dedicated OLED device may be located: along the lower longitudinal edge (in the mounted position), in particular on the driver's side, especially for those chosen for the assistance driving (pictograms etc), requiring rapid reaction of the driver, - alternatively or cumulatively along the upper longitudinal edge (in the mounted position) in particular for pictograms chosen for driving assistance or information on the state of the vehicle - alternatively or cumulatively along the driver's side edge (in the mounted position), in particular for pictograms chosen for driving assistance or information on the condition of the vehicle - alternatively or cumulatively along the edge side passenger side (in mounted position) especially for the pictograms concerning it.

The first OLED sign can be chosen from: - a driving aid, preferably on the lower longitudinal edge - an indicator of the operating state of the car, preferably on the lower longitudinal edge, upper edge or the lateral edge on the driver's side - information on the external environment: weather, ... on the upper longitudinal edge - a sign of connectivity to the communication network on the side edge passenger side.

The first OLED signaling is preferably behind a first solid zone of the inner masking layer (flat preferably enamel and on the face F2) with the passage opening or window. The first OLED sign can be close to a discontinuous zone (decorative) of internal masking adjacent to the first solid zone, especially in the form of a set of decorative patterns (often subcentiometric and spaced from 0.01 to 2 cm), in particular in enamel (the same enamel as the solid zone). For example the patterns are of decreasing size towards the middle of the clear glass and / or more spaced toward the middle of the clear glass.

The inner masking layer may be a strip along a windshield edge. It may be desirable to increase the width locally so that the driver (or copilot) can better see the first OLED signage (without having to lower the eyes too). Also, the inner masking layer may be a band (enamel, face F3 or F4) , in particular longitudinal or lateral on the driver (or passenger) side, of LO width not more than 5,10, 20cm or 30cm, and in the area of the first signage of width L1> L0.

The first OLED device may be able to emit a first radiation at time t1 such as red, green, orange or white and a second distinct radiation at time t2 - such as red, green, orange or white- this depending control signals.

The first OLED signage is preferably inscribed in a rectangle of vertical dimension or centimeter height H, (of horizontal dimension called width W), and defining an angle a between the windshield and the axis of vision of the driver (or passenger ), the first signage is characterized by a vertical dimension called apparent height H 'and H is fixed by the formula is defined a vertical dimension said apparent height H' and H is fixed by the formula H = ^ '' / sin (a)

For example for a signage of apparent height H '(target) at 2cm and an angle of 25 ° H is 4.7cm. Correction by anamorphosis can therefore be important.

For example, the first sign (pictogram) may be written in a square or a rectangle of H (or better H ') and W (or better W) from 1 to 10cm and better from 2 to 5cm.

To a lesser extent, one can also seek to compensate for the perspective effect by broadening the basis of the first sign of a factor (1 + H '/ (d tan (a))) with respect to its vertex where d is the distance between the driver (or passenger) and the first signage.

All or part of the first OLED device can be arranged in the window clear preferably in the vicinity of the opaque inner masking layer.

The windshield may include a color filter between the first OLED device including emitting in the white and the face F4 (face side F4 or F3).

It can also be used with a color OLED in the case where its emission spectrum does not allow to reach directly given colorimetric coordinates (as fixed in a standard for example, or requested by the car manufacturer). For example, when the emission spectrum is too wide, the color filter then makes it possible to cut at least a part of it.

The color filter preferably comprises a colored filtering layer which is side F3 in particular in contact with the face F3: on the face F3

or on the first OLED device or on a common support, curved, of the first OLED device and of a second OLED device forming a second sign, transparent support at the front of the first OLED device.

It is possible to use different types of filters (of different constitution and mode of operation), which act on or modify the luminous emission of the OLED device in a controlled, controlled and reproducible manner (their light transmission have for this purpose a spectral dispersion different from that of the luminous emission of the OLED device). These filters can be colored transparent polymers, colored glasses, the coloring being deposited or in the mass, or can be layers deposited on the OLED or the interlayer of lamination, etc. as explained below.

As mentioned above, one or more absorption filters is preferably used (this absorption being in particular controlled by organic or inorganic compounds added, if appropriate, to a glass or plastic matrix). This type of filter may for example be formed by deposition of one or more inorganic or organic dyes or pigments (optionally dissolved or dispersed in a medium, in particular such as a silicone, epoxy or acrylic type resin, a drying ink UV, or a sol-gel type mineral matrix) on the surface of a transparent carrier element like the common support (on the front). This element may be a glass material (soda-lime glass, borosilicate glass, or it may be one of the faces F3 or F4 of the second glazing itself, preferably the face F3, or else of the emission face of the device OLED itself) or plastic / polymer (polyethylene terephthalate type polymer sheet, in particular heat-stabilized, polycarbonate, acrylate, polyetheretherketone (PEEK), etc., or it may be a face of the same lamination interlayer, or still of the emission face of the OLED device itself), examples of these filters being in particular the gelatines or colored polymer filters marketed by the companies Lee Filters or Rosco. Preferably, the carrier element is the second glazing itself, the OLED itself, or the lamination interlayer located between the OLED device and the second glazing itself. The deposit can be produced by screen printing, by inkjet or laser printing, by spray, by dipping, by roller application, etc., and is preferably produced by screen printing or inkjet printing, in particular on the second glazing. and / or the OLED device (and / or optionally an intermediate element such as a lamination interlayer), in particular and advantageously by ink jet. It should be noted that the colored substances, in particular dyes or pigments, used to produce the above-mentioned filters preferably resist heat. For example, it is possible to advantageously use polychlorinated or non-chlorinated copper phthalocyanine pigments, used in a mixture and dispersed in a resin, in particular of the crosslinkable polysiloxane type, the mixture being for example (and advantageously) applied in particular by screen printing. In the case of inkjet printing, the inks used can be in particular UV-curing inks, stable in temperature and in light, such as, for example, the Anapurna M reference inks marketed by Agfa.

The absorption filter advantageously makes it possible to obtain the chosen effect or color irrespective of the angle of incidence of the observation.

In another embodiment, one or more filters acting by light reflection (This reflection being in particular controlled by interference occurring within a stack of thin layers made of different materials, a thin layer being a layer of which the thickness is less than the wavelength of light), especially dichroic type filters, based on semi-reflective interferential layers (layers), etc. Such filters are made for example by physical vapor deposition (vacuum) (PVD) (sputtering, magnetron assisted sputtering, evaporation) or chemical vapor phase (CVD) alternating layers of high and low refractive indexes, the substrate on which the deposit is made may be a glass material or a polymer.

The reflection filter makes it possible to obtain the chosen effect or color in the driver's axis of vision, the perception being however possibly different at another incidence.

The inner masking layer may face F3, the passage opening may be filled with a transparent layer including the thermoformable material (thermoplastic, PVB preferably) or a colored filter layer as mentioned above.

The first OLED device preferably comprises in this order: a substrate (dielectric preference, especially transparent: plastic or glass film); optionally one or more functional layers: a moisture barrier layer (if a plastic substrate) or a barrier layer; with alkalis (if glass substrate) - and / or light extraction layer: diffusing layer, for example enamel or other mineral binder (sol-gel etc.) or organic with diffusing particles if glass substrate or organic binder (resin) or mineral (sol gel) with diffusing particles if plastic substrate, - a lower electrode (anode), preferably transparent - a first organic electroluminescent system (several emitters of different colors can be stacked), and an upper electrode preferably reflective.

Several types of OLED are known: - at the rear emission (through a transparent substrate, called "bottom emitting"), the lower electrode being transparent and the upper reflecting electrode, - emitting by the before (at the output of the upper electrode, called "top emitting"), the lower electrode being reflective and the upper transparent electrode - emitting from the rear and the front using transparent or semi-transparent electrodes

Preferably, a first backward-emitting OLED device is used, so the substrate is on the F3 side (rather than F2).

For a transparent (preferably lower) electrode it may be a metallic grid for example silver (of suitable width), or a transparent electroconductive layer such as a transparent conductive oxide ('TCO') or a stack of thin layers with at least one (fine) metal layer, in particular silver, between two dielectric layers, for example oxy and / or metal nitride or metals (Sn, Zn, etc.)) or silicon.

The first OLED device may have one or more technical edges (non-emitting zones), for the power supply, at the periphery of the emitting zone, typically in one or more bands surrounding the emitting zone. This technical edge may be a current supply zone. A technical edge may be W2 width of at most 2 cm and preferably at most 1 cm or even at most 6 mm or 5 mm.

The passage opening (s) are preferably openings in the inner masking layer whose shape is adjusted. These openings may be made by removal of material or by masking during opaque layer deposition.

It may be desirable that the first signage and the second and other adjacent signage be aligned, in a single row, rather than superimposed especially if behind the masking area.

It is preferred that the inner masking layer (preferably enamel) mask the technical edge or edges of the first OLED device and even mask any electrical connector (visible type) present between the face F2 and F3, connected to the first OLED device, connector such as cable, wire (s), conductive film etc.

Preferably, the first OLED device exceeds (by its width and / or height) the first sign, for example at least 5 mm and even at least 1 cm so that the light emitting area of the OLED is easily opposite the discontinuity of passage.

It is also preferred that the inner masking layer (preferably enamel) mask the technical edge (s) of the first OLED device and even mask any electrical connector (visible type) present between the face F2 and F3, connected to the first OLED device, connector such as a cable, one or more wires, a conductive film, etc.

In a given peripheral area one may wish several luminous signage (pictograms etc.) side by side (aligned for example, or at the corner of the windshield, etc.).

Also, preferably, a second OLED device forms a second sign, in sign (s) and / or letter (s), adjacent to the first sign, in particular spaced at least 1 cm and preferably at least 2 cm (because technical edges of at least 5mm most often as already indicated). The second organic light-emitting diode device called curved OLED, is therefore between the faces F2 and F3, second OLED device distinct from the first OLED device.

And preferably the first and second OLED devices are (mounted) on a common support of thickness E2 'with E2 + E'2 less than E3 and preferably subcentimetric, curved, so light emission side, or back side.

The first and second OLED devices are glued (glue, double-sided adhesive) to the common support or placed on the common support. The first and second OLEDs devices can be connected to the common support by one or more points of welding, for example 2 or 4 points of welding.

This common support may be of thickness E2 'of at most 0.15 mm and even at most 0.1 mm. Its general shape may be a rectangular strip (bar) along the first edge (longitudinal or lateral) optionally L with a bent portion for the electrical connections.

This common support can be dielectric and even transparent:

glass particularly chemically tempered or plastic: as a PET - or even a conductive sheet, metal (if back side).

The common support advantageously serves: - to handle and assemble more easily a pre-assembled set of OLEDs - to make electrical connections more easily - as mechanical reinforcement

The common back side support can be against or glued (double-sided adhesive, glue) to the F2 side or the common front side support (light emitter) can be against or glued (double-sided adhesive, glue) to the F3. The common rear side support can be separated from the face F2 by the lamination interlayer. The common front side support can be separated from the face F3 by the lamination interlayer.

The common support side rear or front side be encapsulated by the lamination interlayer, using 2 or 3 sheets (hollow central sheet to house the common support) for lamination, including PVB.

The common support can: - be carrying electrical conductors (wires, tracks, layer with insulation discontinuities etc) supplying the first OLED device and the second OLED device, and in particular is masked by the inner masking layer (and / or possibly vehicle trim, dashboard, etc.) - and / or protrude from the edge of the windshield (by being bent with a protruding bend or protruding band) and / or bent to extend to face F4 (edge), against or glued to the face F4, and / or be carrying one or more electronic components including a first microcontroller ("driver") addressing the first OLED device and regulating the power supply (the current preferably) of the first OLED device and even of one or two electronic components including a second microcontroller addressing the second OLED device and regulating the power supply (the preferably) of the second OLED device.

Each microcontroller identifies in the control signal if an order is intended for its dedicated signage and adjusts the level (the intensity of the current for example) accordingly.

For each OLED, on the common medium two electrical conductors are preferred for the control signal decoded by the dedicated microcontroller and two electrical conductors for the power signal connected to the microcontroller.

A subset of pictograms, such as rods and / or combined with letters, can be selectively illuminated in real time to easily form an indicator a level (of oil, gasoline), speed, or a wear condition ....

Furthermore, it is possible to provide means for modulating the OLED power according to at least two configurations: a configuration for night vision, in which the power of the first OLED device is adjusted so that the luminance of the first signaling is typically between about 30 and about 100Cd / m2 and a configuration for daytime vision, wherein the power of the first OLED device is adjusted so that the first signage is typically between about 200 and about 2000Cd / m2. In daytime vision, it is also possible to adjust the luminance according to the external illumination, in particular with a natural light sensor in the windshield or elsewhere in the vehicle: if there is a lot of sunshine, it is strongly lit. 'OLED, if it's covered, it lights less hard not to dazzle.

If necessary, a transparent protective film or transparent protective varnish may cover the common support assembly and OLED device (s). For example it is a transparent and protective epoxy varnish, for example of the type marketed by MARABU under the reference MARABU GL 914®,

The common support at the front, transparent as a polyamide PET, can carry a common or dedicated color filter to any OLED device that requires it (filter assembly side or side opposite the assembly), in particular a set of coloring layers.

The first OLED device may be covered by a protective dielectric layer possibly carrying electrical conductors supplying the first OLED device, forming an adhesive film by contact or with a sticky main surface or a deposited layer (varnish, resin, deposit by liquid way) -. Optionally, this protective layer protrudes from one or more edges of the first OLED device and covers a second OLED device adjacent to the first OLED device forming a second pictogram.

The protruding protective layer is on the light emission side (on the chosen transparent upper electrode) or on the opposite side to the light emission (on the chosen upper reflecting electrode, in particular aluminum or silver).

The protruding protective layer can be:

a carrier film of the first and second OLED devices

a sticky film covering a common support (plastic film, glass, etc.), carrier of the first and second OLED devices; a sticky film on the face F2 if the first OLED device is against or pre-glued to the face F2 (as the second OLED device) - a layer deposited on the common support carrier of the first and second OLED devices.

Furthermore, there may be several configurations of arrangement of the first OLED device vis-à-vis the lamination interlayer.

In a first embodiment; the first device OUED is mounted on the face F2 directly or via a common support with a second OLED device adjacent to the first OLED device forming a second sign, in particular first OLED device glued by a double-sided adhesive and possibly the first principal face of bonding is perforated to the right of the first OLED device (active zone and technical edges) with an extra thickness of the lamination interlayer relative to the first OLED device leaving a space preferably of height of at most 0.4 mm or at most 0 , 3mm or even the second optional OLED device and preferably the lamination interlayer covers the possible common support (and even the encapsule), or the first OLED device is mounted on the face F3 directly or via a common support with a second OLED device adjacent to the first OLED device forming a second sign, in particular first OLED device glued by a n transparent double-sided adhesive, optionally the second main bonding face is perforated to the right of the first OLED device (active area and technical edge) or even the second optional OLED device including an extra thickness of the lamination interlayer relative to the first device OLED leaving a preferred height space of not more than 0.4mm or not more than 0.3mm and preferably the lamination interlayer covers the possible common support (and even encapsulates it), Realize the hole to the right the first OLED device can provide better lamination.

If the first OLED device has E2 thickness of less than 0.15mm or even better than 0.1mm, it can easily be flicked between two tab sheets.

If the first OLED device is greater than 0.15mm thick or even 0.1mm, it may be preferable to flip it with three interlayer sheets and preferably with a central film of thickness substantially equal to E2 or E ' 2 + E2 if it is on a common medium.

One can make a reserve of a central leaflet or a single leaflet: - to house the first OLED device (if individual) - to house the common support carrier of the first OLED device It can be done in a single leaflet or not as many reserves to house only OLED devices, this device covers the common carrier carrier OLED devices.

The first OLED device may be within the lamination interlayer, so the first OLED device is encapsulated by the thermoformable material with a non-zero thickness E21 L2 laminating interlayer and with a non-zero thickness E22 side F3, E21 and E22 are not necessarily equal.

The thermoformable material constituting said interlayer is chosen from the group of polyvinyl butyrals (PVB), plasticized vinyl polyvinyl chloride (PVC), polyurethane (PU) or ethylene vinyl acetate (EVA). Preferably the thermoformable material is a polyvinyl butyral (PVB), optionally having a cross-section decreasing wedge-shaped from the top to the bottom of the laminated glazing. The lamination interlayer may have a cross-sectional shape tapering downwardly from the top to the bottom of the laminated windshield, particularly to avoid a double image in the case of an additional head-up display (HUD).

It may be desirable to preserve the acoustic properties of windshields. The lamination interlayer may comprise at least one so-called medium layer of viscoelastic plastic material with vibro-acoustic damping properties, especially based on polyvinyl butyral and plasticizer, and the interlayer, and further comprising two outer layers of standard PVB. the middle layer being between the two outer layers. and even to use a HUD head-up display device, optionally one or both of the outer layers has a wedge-shaped cross-sectional shape from the top to the bottom of the laminated glazing, the viscoelastic plastic material layer having the properties vibro-acoustic damping device having a constant cross-section from the top to the bottom of the laminated glazing unit.

The inner (respectively outer) masking layer may be a black enamel layer, a paint layer or an opaque ink, preferably on the F2 (or F3 or F4) side, or on the lamination interlayer or on a film additional carrier (PET, etc.) Advantageously, the inner and outer masking layers consist of the same material, preferably enamel in particular black, F2 and F3 or F2 and F4.

The first glazing as the second glazing can be parallelepiped, with leaves or rectangular, square or even any other shape (round, oval, polygonal). It can be large, for example with a surface greater than 0.5 or 1 m 2.

The first and / or second glazing can (according to the aesthetic rendering, the desired optical effect) be a clear glass (TL light transmission greater than or equal to 90% for a thickness of 4 mm), for example a standard soda-lime glass composition like Planilux® from Saint-Gobain Glass, or extra-clear (TL greater than or equal to 91.5% for a thickness of 4 mm), for example a silico-soda-lime glass with less than 0.05% Fe III or Fe 2 O 3 such as Saint-Gobain Glass Diamant® glass, or Pilkington Optiwhite®, or Schott B270®, or other composition described in WO04 / 025334.

The glass of the first and / or second glazing may be neutral (without coloration), or (slightly) tinted in particular gray or green, such as VENUS glass or TSA from Saint-Gobain Glass. The glass of the first and / or second glazing may have undergone a chemical or thermal treatment of the type hardening, annealing or quenching (for a better mechanical strength in particular) or be semi-tempered.

TL light transmission can be measured according to ISO 9050: 2003 using illuminant D65, and is the total transmission (in particular integrated in the visible range and weighted by the sensitivity curve of the human eye), taking into account both the direct transmission and the possible diffuse transmission, the measurement being made for example using a spectrophotometer provided with an integrating sphere, the measurement at a given thickness being then converted if necessary to the 4mm reference thickness according to ISO 9050: 2003.

For a windshield the TL may preferably be at least 70% and even at least 75%.

In one embodiment, the first glazing is made of mineral glass and the second glazing is made of organic glass (such as PC, PMMA, cycloolefin copolymer (COC) or polyethylene terephthalate (PET) optionally protected by a coating (in face F4).

The outer glazing may comprise thin functional layers on one or other of its faces F1 and F2 or both: there may be mentioned a hydrophobic or self-cleaning layer photocatalytic face F1, a layer or a thin layer of reflective layers solar radiation in front of F2 (and serving to make or capacitive sensors, antenna etc).

In order to limit heating in the passenger compartment or to limit the use of air conditioning, at least one of the glazings (preferably the outer glass) is tinted, and the laminated glazing may also include a layer of reflective or absorbent solar radiation, preferably on the face F4 or face F2 or F3, in particular: a transparent electroconductive oxide layer called TCO layer (opposite F4) or a thin film stack comprising at least one TCO layer; a stack of thin layers comprising at least one silver layer (in F2 or F3), the or each silver layer being disposed between dielectric layers.

One can cumulate layer (silver) face F2 and / or F3 and TCO layer F4 face.

The TCO layer (of an electrically conductive transparent oxide) is preferably a fluorine-doped tin oxide layer (SnO2: F) or a tin-indium mixed oxide (ITO) layer. For ITO layers, the thickness will generally be at least 40 nm, or even at least 50 nm and even at least 70 nm, and often at most 150 nm or at most 200 nm. For fluorine-doped tin oxide layers, the thickness will generally be at least 120 nm, or even at least 200 nm, and often at most 500 nm. For example, the low-emissivity layer comprises the sequence next: high index underlayer / low index underlayer / optional TCO layer / dielectric overcoat. As a preferred example of a low-emissivity layer (protected during quenching, it is possible to choose high-index sub-layer (<40 nm) / low-index underlayer (<30 nm) / an ITO layer / high-index overcoat (5 -15 nm) )) / supercoat low index (<90 nm) barrier / last layer (<10 nm) .Low emissivity can be mentioned those described in US2015 / 0146286, on the F4 side, especially in Examples 1 to 3.

The transparent layer F3 or F4 may be electrically insulated or even absent in the area opposite the first sign (of the first OLED device) for color reasons.

The face F3 may therefore comprise a heating layer, preferably transmission neutral, optionally under the internal masking layer F3, surmounted by first and second current feed strips typically on the first and second longitudinal edges, particularly opaque, by example enamel silver.

Also, the first OLED signaling, in particular on a first longitudinal edge, may be shifted by a first opaque current supply band of a heating layer F3. The first current supply strip may be more central than the first sign. The invention and its advantages will be better understood on reading the non-limiting embodiments described below, in connection with the following figures.

FIG. 1 represents a passenger-side front view of a first windshield comprising the internal luminous signs according to the present invention.

FIG. 1 'represents a front view on the passenger side of a second windshield comprising the internal luminous signs according to the present invention.

Figure 1 "shows a partial view of the passenger side of a third windshield comprising the internal luminous signage according to the present invention.

FIG. 1i is a side view which shows the inclination of a windshield with an internal luminous signage according to the invention and FIG. 1j shows signings stretched in the vertical direction to compensate the effect of the tilt.

Figure 1a shows a partial side sectional view of a laminated windshield comprising one or more internal luminous signs according to the present invention. FIG. 1b represents a partial view in longitudinal section of a laminated windshield comprising one or more internal luminous signs according to the present invention.

Figure 2a shows a partial side sectional view of a laminated windshield comprising one or more internal luminous signage according to the present invention. FIG. 2b represents a partial view in longitudinal section of a laminated windshield comprising one or more internal luminous signs according to the present invention.

FIG. 2c shows a partial side sectional view of a laminated windshield comprising one or more internal luminous signs according to the present invention. FIG. 2d represents a partial view in longitudinal section of a laminated windshield comprising one or more internal luminous signs according to the present invention.

3 shows an exploded partial view in longitudinal section of a laminated windshield comprising one or more internal luminous signs according to the present invention.

FIG. 3a shows an exploded partial view in side section of a laminated windshield comprising one or more internal luminous signs according to the present invention.

FIG. 3b shows an exploded partial side sectional view of a laminated windshield comprising one or more internal luminous signs according to the present invention.

FIG. 4 represents an exploded partial view in longitudinal section of a laminated windshield comprising one or more internal luminous signs according to the present invention.

FIG. 5 represents an exploded partial view in longitudinal section of a laminated windshield comprising one or more internal luminous signs according to the present invention.

Figure 5 'shows an exploded partial side sectional view of a laminated windshield comprising one or more internal luminous signs according to the present invention.

FIG. 6 represents an exploded partial view in longitudinal section of a laminated windshield comprising one or more internal luminous signs according to the present invention.

Figure 6 'shows an exploded partial side sectional view of a laminated windshield comprising one or more internal luminous signage according to the present invention.

Figure 7 shows a partial sectional view of a laminated windshield comprising one or more internal luminous signs according to the present invention.

FIG. 8 represents a perspective view of a common support carrying two oleds devices and carrying the laminated current supply conductors in the windshield,

FIG. 9 represents a perspective view of a common carrier carrying two OLED devices and carrying current leads of two laminated microcontrollers in the windshield.

Figure 1 shows a front view of the passenger compartment of a windshield comprising the internal luminous signs according to the present invention.

The windshield 1000 is laminated comprises a first curved outer glazing with main faces F1 (the outermost) and F2, a polymeric lamination interlayer such as a PVB, a second glazing internel 'curved with main faces F3 and F4 (the more internal).

It is rectangular in shape, defined by its lateral and longitudinal edges and with an opaque peripheral frame, here black, face F2 and face F3 or F2 and F4.

The inner masking layer 4 is opaque and may be black enamel deposited on the face 13 or F3 or the face 14 or F4 of the inner glass 1 ', in optically opaque paint or ink deposited on the polymer interlayer or in an opaque polymer layer , tinted or painted, attached and laminated between the inner glass and the interlayer.

The deposition of this layer is done according to any technique known to those skilled in the art, for example, without limitation, by screen printing techniques, inkjet type techniques or offset type techniques, flexographic printing. or gravure.

This layer 4 contains discontinuities 51 forming openings of passages including geometric outline (rectangle, square, or even triangle, round, following the general outline of the sign) for OLEDS devices forming luminous signage such as pictograms.

A plurality of dedicated OLED signs are located along the lower longitudinal edge 15a (in mounted position) in particular on the driver's side, especially for those chosen for driving assistance (requiring a rapid response from the driver, for example the OLED devices are on a common support 7).

One can quote: - witness of speeding ("SPEED" in letters) which lights possibly in red or possibly in orange when the limit is almost reached - diagnosis anti frontal collision, for example lighting if the vehicle is too close to the front vehicle (car, motorcycle etc.), not respecting the safety distance - a safety triangle in case of danger.

A plurality of OLED signs are located along the upper longitudinal edge 15b (in the mounted position), in particular in the central position conventionally used for fixing the mirror, for example the OLED devices are on a common support 7.

A plurality of dedicated OLED signs are located along the left side edge 15c (in the mounted position), for example the OLED devices are on a common support 7. There may be mentioned: - pictograms on the state of the vehicle: oil level , temperature, door not properly closed, belt not attached, - pictograms on the lights on or off

A plurality of dedicated OLED signs are located along the right side edge 15d (in mounted position) for example the OLED devices are on a common support 7.On mention may be made of: - pictograms on the door (badly closed), the belt of security (not attached), - pictograms on air conditioning, ventilation - pictograms on information on the external environment: a witness of the location of a friend near the vehicle - a witness of connectivity to a telecommunication network

The width of the enamel band 4 is wisely larger in the areas of OLED signage.

FIG. 1 'represents a front view on the passenger side of a second windshield comprising the internal luminous signs according to the present invention.

A plurality of dedicated OLED signs are located along the lower longitudinal edge 15a (in the mounted position) on the driver's side, for example the OLED devices are on a common support 7.

We can mention: - anti-collision left-side collision, for example lighting up if the vehicle doubling and / or in the left-hand lane is too close anti-collision right-side collision, for example lighting up if the vehicle on the right lane is too close - diagnosis of positioning on a line, for example lighting up if one is too far off to the left or to the right

The common support may be L-shaped to extend on either side of a corner as here left side edge 15c and upper longitudinal edge 15b.

Figure 1 "shows a partial view of the passenger side of a third windshield comprising the internal luminous signage according to the present invention.

An OLED pictogram for example here the emergency triangle can be isolated from other pictograms, with an enamel allowance dedicated to this pictogram. For example, the first OLED device is here mounted on the face F2 or F3 or laminated between the face F2 and F3 (without common support).

Figure 1i is a side view which shows the steepness of a windshield with an internal luminous signage according to the invention of actual height H and apparent height H '(perceived by the driver opposite).

For example, the angle a is about 25 °.

And Fig. 1j shows vertically stretched signage to compensate for the effect of inclination.

Figure 1a shows a partial side sectional view of a laminated windshield 100a comprising one or more internal luminous signage according to the present invention.

The laminated windshield of vehicle 100a with internal luminous signage, comprises: a first glaze, curved, preferably made of mineral glass, optionally tinted, in particular gray or green, with a first main face, called F1, intended to be on the outside of the vehicle and a second opposite main face called F2, glazing E1 thickness preferably at most 2.5mm, even at most 2mm - including 1.9mm, 1.8mm, 1.6mm and 1.4mm- or even of at most 1, 3 mm or at most 1 mm, - a second glazing, curved (like the first glazing), preferably of mineral glass, with a third main face called F3 and a fourth opposite main face called F4, in particular intended to be interior side of the vehicle, of thickness ΕΊ preferably less than E1, even of at most 2mm - in particular 1.9mm, 1.8mm, 1.6mm and 1.4mm- or even at most1.3mm or not more than 1mm, the total thickness of glazing Ε1 + ΕΊ being preferably strictly below 4mm, even at 3.7mm, said first and second glazing being interconnected via the faces F2 and F3 by a lamination interlayer of thermoformable polymeric material (clear, extraclear preferably thermoplastic and even PVB, thick) (total) E3 of not more than 2.2mm better than 2mm, not more than 1.5mm or not more than 1mm, for example from 1, 2 or 3 sheets, in particular indented of the second glazing (not more than 5mm or even not more than 2mm or not more than 1mm) and even behind the edge of the first glazing- (of not more than 5mm or not more than 2mm or less than plus 1mm), a spacer comprising a first main face-bonding side F2 and a second face-side main bonding face F3, - a first so-called inner-masking peripheral layer 4 made of an opaque material, which along a border of the face F3, on the face F4, in particular along a border of the face F 4, in particular (directly) on the face F4, said inner masking layer being discontinuous and thus comprising a first discontinuity 51 forming a window - a second peripheral layer called outer masking 6 of opaque material, on the face F2, opposite the inner masking layer and the first discontinuity (s), -c along a border of the F2- face,

In addition, a first organic light-emitting diode device called OLED, bent (flexible, flexible bus) being between the faces F2 and F3, forming the first sign opposite the window 51 of the inner masking layer.

The first device known as OLED 2 has a thickness E2 that is smaller than E3 and is preferably subcentimetric and even at most 0.5 mm and better still at most 0.35 mm, in particular with a thickness substantially equal to a thermoplastic sheet, hence 0 , 76mm, 0.38mm or 0.17mm.

The first OLED device is for example individual (not worn with an OLED device on a common support) is here encapsulated by the thermoformable material by means of two or three sheets of PVB.

A functional layer, such as a transparent conductive layer 6 'may be on the face F3 and serve for example as a solar anti-heating layer (anti-fog etc.). If necessary, for color reasons we can remove this layer in the area or areas of signage.

The inner masking layer 4 and the outer masking layer 6 are made of the same material, preferably in enamel.

FIG. 1b represents a partial view in longitudinal section of a laminated windshield 100b comprising one or more internal luminous signs according to the present invention.

The vehicle laminated windshield 100b with internal luminous signage differs from the windshield 100a in that a flexible common support 7 carries several OLEDS devices each forming a given sign (here two).

The flexible common carrier 7 is here at the back of the OLEDS devices. It can advantageously carry electrical conductors to power the OLEDS devices and extend to an edge of the windshield and even protrude from the windshield to simplify the electrical connections.

The flexible common support 7 can be a plastic such as a PET, thin at most 0.2 mm, or a particularly chemically toughened glass. It is not necessarily transparent or carrying transparent conductors because masked by layer 4 (and layer 6).

FIG. 2a shows a partial side sectional view of a laminated windshield 200a comprising one or more internal luminous signs according to the present invention.

The vehicle laminated windshield 200a with internal luminous signage differs from the windshield 100a in that a colored filtering layer 9 is deposited (sol-gel, etc.) or is a film against or fixed on the face F3 directly or on the optional functional layer 6 '. In this case, this can be used to choose the color from an OLED transmitter device in white or adjust the color emitted by a colored OLED device.

FIG. 2b shows a partial view in longitudinal section of a laminated windshield 200b comprising one or more internal luminous signs according to the present invention.

The vehicle laminated windshield 200b with internal luminous signage differs from the windshield 100b in that a colored filter layer 9a, 9b is deposited (sol-gel etc.) on the OLEDS devices. In this case, this can be used to choose the color from an OLED transmitter device in white or adjust the color emitted by a colored OLED device.

FIG. 2c shows a partial side sectional view of a laminated windshield 200c comprising one or more internal luminous signs according to the present invention.

The vehicle laminated windshield 200c with internal luminous signage differs from the windshield 100a in that: the layer 4 is deposited on the face F3 directly (preferably) or on the optional functional layer 6 '. a colored filtering layer 9 is deposited on the face F3 directly (preferably) or on the optional functional layer 6 '.

For example layer 4 and filter layer 9 are enamel.

An alternative all enamel is possible side face F4.

FIG. 2d represents a partial view in longitudinal section of a laminated windshield comprising one or more internal luminous signs according to the present invention.

The vehicle laminated windshield 200c with internal luminous signage differs from the windshield 200b in that the common support 7 '(transparent) is the emitter face of the OLEDS devices 2a and 2b. Its rear face 71 '(front side F2) carries the OLEDS devices 2a and 2b. Its front face 71 '(face side F3) carries the colored filter layers 9a and 9b. Alternatively, the colored filtering layers 9a and 9b are on its rear face 71 '(face side F2).

FIG. 3 represents an exploded partial view in longitudinal section of a laminated windshield comprising one or more internal luminous signs according to the present invention (for simplification the elements are not drawn curved, curved).

The first and second OLED devices 2a and 2b are chosen to be rear-emitting and each comprise: a first curved transparent substrate 20, for example plastic (PET etc.) or glass (tempered), carrying: -a lower electrode (Closest to the substrate) 21, transparent for example ITO or metal grid (silver etc.) -of a first organic electroluminescent system 22, - a so-called upper electrode (the farthest from the substrate) 23, reflective, for example aluminum or silver - a varnish or a protective film 24, for example kapton glued to the upper electrode, possibly exceeding and with contact pads for the electrodes.

Each device is glued by an adhesive 8 or a double-sided adhesive to the common support 7 further back. The OLED devices may be against the face 72 of the support and linked just by soldering points between contacts of the electrodes and conductors on the face 72. These contacts may be on the same side of the OLED device for example 21a and 23a.

FIG. 3a shows an exploded partial view in side section of a laminated windshield 300a comprising one or more internal luminous signage according to the present invention (for simplification the elements are not drawn curved, curved).

It illustrates the lamination of the first OLED device 2 from the rear (or optionally from the front or the back) possible from 3 sheets preferably of PVB - two external sheets 33 and 34 in contact with F2 and F3

a perforated central sheet (with a recess 35a) on the periphery of the common support 7, of substantially the same thickness as the support assembly and OLED device

Leaflet 33 can be optional

FIG. 3b shows an exploded partial view in side section of a laminated windshield 300b comprising one or more internal luminous signs according to the present invention (for simplification the elements are not drawn curved, curved).

It illustrates the foliation of the first OLED device 2 to

emission from the rear (or optionally by the front or the return) possible from two sheets preferably PVB - an external sheet 33 side-side F2 - a perforated sheet 34 (with a recess 34a) on the periphery of the first OLED device and (slight) oversize compared to the front face of the substrate 20

Leaflet 33 can be optional

FIG. 4 represents an exploded partial view in longitudinal section of a laminated windshield 400 comprising one or more internal luminous signs according to the present invention (for simplification the elements are not drawn curved, curved).

It differs from the windshield 300 in that the support 7 is directly acting as a protective film of the upper electrode 23. The support 7 can be glued to the upper electrode.

FIG. 5 represents an exploded partial view in longitudinal section of a laminated windshield comprising one or more internal luminous signs according to the present invention (for simplification the elements are not drawn curved, curved).

It differs from the windshield 300 in that the support 7 'is front side. It is transparent like a PET or a glass. The front face of the substrate can be glued to the face 71 '

The OLED devices 2a and 2b may be against the face 71 'of the support 7' and linked just by soldering points between contacts of the electrodes and conductors on the face 7T. These contacts may be on the same side of the OLED device, for example, rated 21a and 23a.

FIG. 5 'is a partial exploded view in side section of a laminated windshield 500' comprising one or more internal luminous signs according to the present invention (for simplification the elements are not drawn curved, curved).

It illustrates the lamination of the first device OLED 2 emission from the rear (or optionally by the front or the return) possible from 3 sheets preferably PVB - two external sheets 33 and 34 in contact with F2 and F3 - a perforated central sheet (with a recess 35a) on the periphery of the common support 7 'on the front side substantially of the same thickness as the support assembly 7' and OLED device.

Sheet 34 can be optional

FIG. 6 represents an exploded partial view in longitudinal section of a laminated windshield 600 comprising one or more internal luminous signs according to the present invention (for simplification the elements are not drawn curved, curved).

It illustrates the lamination of the first device OLED 2 emission from the rear (or optionally by the front or the return) possible from 3 sheets preferably PVB - two external sheets 33 and 34 in contact with F2 and F3 - a perforated central sheet (with a recess 35a) around the periphery of each OLED device 2a and 2b (without common support) of substantially the same thickness as the OLED device.

Leaflet 33 can be optional

FIG. 6 'is an exploded partial view in lateral section of a laminated windshield 600' comprising one or more internal luminous signs according to the present invention (for simplification the elements are not drawn curved, curved).

It illustrates the lamination of the first device OLED 2 emission from the rear (or optionally by the front or the return) possible from 2 sheets preferably PVB - an external sheet 33 in contact with F2 - a central leaflet 34 hole (with a recess 34a) on the periphery of the OLED device 2 (without common support), in excess of the front face of the substrate 20.

Leaflet 33 can be optional

Figure 7 shows a partial sectional view of a laminated windshield 700 comprising one or more internal luminous signage according to the present invention (for simplification the elements are not drawn curved, curved).

The OLED device 2 may have a substrate or be on a support (common to other OLED devices) with a portion 26 protruding on the edge of the windshield, curved and up to the face F4, being glued on the face F4 by an adhesive 7a. The body is itself glued to this place by a bead of glue 7b.

As here, one can provide a notch of the inner glass 1 'to facilitate folding to the face F4 and gain compactness.

The distance D between the (longitudinal) edge of the glazing and the bottom of the first sign can be at least 5cm, 8cm, 10cm. The distance D between the (longitudinal) edge of the glazing and the bottom of the first signage may be at most 25 cm even at most 20 cm.

FIG. 8 represents a perspective view of a common carrier 7 carrying two OLED devices 2a and 2b forming a sign and carrying the current supply conductors, a common support 7 laminated in the windshield and with a bent portion 73 coming out. by the slice 15.

FIG. 9 represents a perspective view of a common carrier bearing two OLED devices forming a sign and carrying the current supply conductors of two microcontrollers 10a and 10b, a common support 7 laminated in the windshield and with a bent part. 73 leaving by the slice 15.

Claims (15)

1. Laminated vehicle windshield, with internal luminous signage (100 to 700), comprising: - a first glazing (1), convex, with a first main face (11) called F1, in particular intended to be the outer side of the vehicle , and a second opposite main face (12) called F2, with a thickness E1 of at most 2.5 mm, - - a second glazing (T), curved, with a third main face (13) called F3 and a fourth face main opposite (14) said F4, in particular intended to be inside the vehicle, thickness ΕΊ of at most 2.2mm, at least one of the first and second windows being mineral glass said first and second glazing being connected between them via the faces F2 and F3 by a lamination interlayer (3, 33, 34, 35) made of a thermoformable polymeric material, which insert comprises a first main face of the bonding side F2 (31) and a second main side of bonding side face F3 (32), - a first the so-called inner masking peripheral layer (4) made of opaque material, which is between the second bonding face (32) and the face F3 (13) or which is on the face F4 (14), - a second peripheral layer known as external masking (6) of opaque material, between the first bonding face (31) and the face F2 (12), facing the inner masking layer (4), - a first radiation source for the first sign, characterized in that the first light source comprises a first organic light-emitting diode device called OLED (2) curved, between the faces F2 and F3 able to emit a first radiation in the visible spectrum in that the first OLED device, able to emit a first radiation forms a first luminous sign, and in that when the first OLED device is in the zone of the inner masking layer, the inner masking layer comprises a first passage opening for the issue the first visible light signage. 2. Laminated vehicle windshield (100 to 700) according to the preceding claim characterized in that the first sign is inscribed in a rectangle of vertical dimension or centimeter height H, and defining an angle a between the windshield and the line of sight of the conductor, the first signage is characterized by a vertical dimension called apparent height H 'and H is fixed by the formula H - f /' / sin (ai) 3. Laminated vehicle windshield (100 to 700) according to one of the preceding claims characterized in that all or part of the first OLED device is arranged in the clear window preferably in the vicinity of the opaque inner masking layer. 4. laminated vehicle windshield (100 to 700) according to one of the preceding claims characterized in that it comprises a color filter between the first OLED device and the face F4 or F3 side face. 5. Laminated vehicle windshield (100 to 700) according to the preceding claim characterized in that the color filter comprises a colored filter layer which is F3 side in particular in contact with the face F3: -on the face F3 -or on the first OLED device -or on a common, curved support of the first OLED device and a second OLED device forming a second sign, transparent support at the front of the first OLED device. 6. Laminated vehicle windshield (100 to 700) according to one of the preceding claims characterized in that the inner masking layer is F3 face, the passage opening (51) is filled by a transparent layer including the the thermoformable material or in a colored filter layer. 7. Laminated vehicle windshield according to one of the preceding claims characterized in that a second OLED device forms a second sign, in sign (s) and / or letter (s), adjacent to the first sign, including spaced at least 1cm and preferably at least 2cm from the first sign, and in that the second curved OLED device (2b) is between the faces F2 and F3, second OLED device distinct from the first OLED device of thickness E2 and preferably the first and second OLED devices are on a common support (7) of thickness E'2 with E2 + E'2 less than E3 with E3 thickness of the laminating interlayer and preferably E'2 subcentimetric, curved , arranged front side so light emission side, or back side. 8. Laminated vehicle windshield according to the preceding claim characterized in that the common carrier, preferably transparent when in the clear glass, is preferably electrically conductive conductors invisible or transparent when present in the clear glass supplying the first OLED device and the second OLED device, and preferably carries one or more first electronic components including a first microcontroller addressing the first OLED device and regulating the power supply of the first OLED device and preferably carries one or more second electronic components including a second microcontroller addressing the second OLED device and regulating the power supply of the second OLED device. 9. Laminated vehicle windshield according to one of the preceding claims characterized in that the first OLED device is covered by a protective layer, possibly dielectric carrier of electrical conductors supplying the first device OLED preferably invisible or transparent when present in the clear glass, possibly this protective layer protruding from one or edges of the first OLED device and covering a second OLED device adjacent to the first OLED device forming a second sign. 10. Laminated vehicle windshield according to one of the preceding claims characterized in that the first OLED device is mounted on the face F2 directly or via a common support with a second OLED device adjacent to the first OLED device forming a second sign, optionally the first main bonding face is perforated to the right of the first OLED device or even the second optional OLED device including an extra thickness of the lamination interlayer relative to the first OLED device leaving a preferably height space of at most 0 , 4mm or at most 0.3mm, and preferably the lamination interlayer covers the possible common support or in that the first OLED device is mounted on the face F3 directly or via a common support with a second OLED device adjacent to the first OLED device forming a second sign, possibly the second main face of c ollage is perforated to the right of the first OLED device or even the second optional OLED device including an extra thickness of the lamination interlayer relative to the first OLED device leaving a space preferably of height of at most 0.4mm or plus 0.3mm and preferably the lamination interlayer covers the possible common support ,. 11. Laminated vehicle windshield according to one of the preceding claims characterized in that the first OLED device is encapsulated by the thermoformable material. 12. Laminated vehicle windshield according to one of the preceding claims characterized in that the thermoformable material comprises a polyvinyl butyral (PVB). 13. Laminated vehicle windscreen according to one of the preceding claims characterized in that the first sign is selected from: - a driving aid preferably on the lower longitudinal edge - a status indicator of the car , preferably on the lower longitudinal edge, upper or the side edge on the driver's side - information on the external environment: weather, ... on the upper longitudinal edge - a connectivity indicator to the communication network on the passenger's side edge before. 14. Laminated vehicle windscreen according to one of the preceding claims characterized in that the inner masking layer and the outer masking layer are made of the same material preferably enamel, F2 and F3 or F2 and F4 and the possible colored filter layer is enamel. 15. Laminated vehicle windshield according to one of the preceding claims characterized in that the inner masking layer is a band width LO and in the area of the first signage width L1> L0, including the driver's side.